WIP elasticapm: properly cleanup buffer and data views

Author: xrmx

elasticapm/transport/base.py

@@ -250,6 +250,7 @@ def _flush(self, buffer, forced_flush=False) -> None:
         """
         if not self.state.should_try():
             logger.error("dropping flushed data due to transport failure back-off")
+            buffer.close()
         else:
             fileobj = buffer.fileobj  # get a reference to the fileobj before closing the gzip file
             buffer.close()
@@ -261,6 +262,8 @@ def _flush(self, buffer, forced_flush=False) -> None:
             except Exception as e:
                 self.handle_transport_fail(e)
 
+            data.release()
+
     def start_thread(self, pid=None) -> None:
         super(Transport, self).start_thread(pid=pid)
         if (not self._thread or self.pid != self._thread.pid) and not self._closed: